Kev here from Sheds Direct Ltd. I’d like to take a few minutes to continue with our informative posts related to buying and owning a high quality garden building.
The question we get asked most often here at Sheds Direct Ltd is,
“do I need a base for my shed and if so how do I go about building it?”
The answer is that all garden buildings need a properly constructed base which is level, secure and of good quality.
The priority is that your base should be solid, square, level and of the correct size. Additionally, you will need to consider things like, having enough room to get around the shed during assembly and maintenance.
We advise that a base be fractionally smaller than the shed footprint and stood proud of the ground. If the base is slightly smaller than the shed footprint then any driving rain will run down the side of the shed and drip clear of the base. Having the base proud of the ground also protects against water pooling and running under the base.
If your Sheds’ footprint is 3000mm x 2400mm for example then subtract 10mm from both dimensions giving 2990mm x 2390mm. Always check the footprint size with the manufacturer before starting your base.
The next consideration is the method of construction. There are many ways to construct a base but most importantly, it needs to be up to the job. A garden building will not stand plumb in the vertical, if the base isn’t level. A few suggestions are, concrete, slabs or paving stones.
For now, we’ll talk about concrete – we will expand on other methods at a later date. First of all, select your site. If it’s on grass, roughly mark out the area and remove the turf. Dig down until you have firm ground (don’t go mad here, you’re not trying to reach Australia).
Mark out the base dimensions accurately and peg out shuttering, making sure it’s square. Check the dimensions across the diagonals with a tape measure. If the measurements across the diagonals are the same then the shuttering is square. Check for level using a long spirit level.
If necessary (where your subsoil is not of a firm and dry consistency), put a layer of hardcore down and leave enough depth for 75mm-100mm of concrete to go on top. Make sure that you break up and compact the hardcore really well. Maybe use a vibration plate where necessary. These can be hired from most builders merchants or plant hire suppliers for a half day.
Pour the concrete and ‘tamp off’ (removes air bubbles and distributes the mix evenly) to the top of the shuttering. You can use ready mix concrete or mix it yourself. Use of a cement mixer is strongly advised if you mix it yourself! Then ‘Float off’ (smooth out the surface of the concrete) to leave a level finish and leave for at least 3 days to set hard – longer if the weather is very cold or wet!
You will now have the perfect base for your beautiful, new garden building from Sheds Direct.
All the best,